Starts in Newcastle, WY and ends 543 miles away in Sioux Falls.
SD has Mount Rushmore National Memorial. If you plan a visit, which could take several hours, please consider motel in the town of Keystone, a very fun place to visit. The next motel is 150 miles away. You do not want to be out there in the dark.
On this section, check out Black Hill National Forest, Custer State Park, Wind Cave National Park, Buffalo Gap National Grassland, Badlands Wilderness Area, Pine Ridge Reservation, RoseBud Indian Reservation, and Ring Thunder Section.
SD has a high percentage of dirt-based roads so expect dust when dry and mud when wet.
Motel, food, gas are all within acceptable riding limits and should not be a problem.
The Southeast section is all on one mile grids and I tried to avoid pavement and congestion as much as possible. This section will be different, but it is all part of the adventure. Enjoy and ride safe.